Lifeboat Mona was produced with a late run to claim the 32Red.com Mares' Hurdle at Sandown.
Paul Nicholls' seven-year-old was ridden confidently by Sam Twiston-Davies and his faith was well founded.
Desert Queen tried to make all but looked a sitting duck as Briery Queen, Midnight Jazz and the eventual winner cruised up behind.
Midnight Jazz led approaching the last, but Twiston-Davies had yet to ask for everything and when he did, there was a positive response from Lifeboat Mona.
The 11-4 joint-favourite pulled three lengths clear up the hill to win the Listed prize in fine style.